Her face lit with a smile. She knew her brother well enough to know when he was telling the truth.

"And he knows if he breaks your heart I'm going to kill him?"

Her mobile beeped, and she rolled her eyes. "Hang on, that better not be an ex text on bloody Christmas... oh. Um."

The text simply read, I know. -SH

"They'll be here in twenty minutes," Sherlock said, tucking his mobile back into his pocket as he moved into the living room. "Should be enough time for a few carols and another cup of coffee."